Enhancing anti-corrosion performance of epoxy coatings through CeO2-induced structural, optical and electrochemical modifications

IF 3.674 4区工程技术 Q1 Engineering

Applied Nanoscience Pub Date : 2025-06-10 DOI:10.1007/s13204-025-03096-9

Veena Rose Mathew, Majo Joseph, G. Aryadevi, Geethu Joseph, K. Niveditha, R. Santhosh Kumar, Ginson P. Joseph

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Abstract

The epoxy/CeO₂ nanocomposite was synthesised, where the nanoceria (CeO₂) were prepared via the hydrothermal method and the dopant with an average grain size of 18.1 nm was incorporated in the epoxy matrix. The corrosion inhibition of stainless steel rods in 1 M CH₃COOH and 0.5 M H₂SO₄ by EP/CeO₂ nanocomposite coverage has been investigated by Tafel polarisation technique and electrochemical impedance spectroscopy (EIS) at the corrosion potential. The study has been carried out at 298 K, where nano-CeO₂ acts as an excellent corrosion inhibitor. The obtained data were analysed and modelled to the appropriate Randles circuit. The sequel of UV–visible radiation on the EP/CeO₂ nanocomposite was interrogated through UV–visible spectroscopy. The highest absorption peak appeared around 402 nm for the sample with a larger inclusion of nanoceria. The dielectric properties of EP/CeO₂ nanocomposite were studied for different frequencies, and its dielectric permittivity and dielectric constant decreased with an increase in frequency. The FESEM graph details the homogeneous dispersion, the particle size distribution of nanoceria in the matrix, and its possibility of agglomeration for some concentrations.

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通过ceo2诱导的结构、光学和电化学改性提高环氧涂料的防腐性能

采用水热法制备纳米铈（CeO2），并将平均粒径为18.1 nm的掺杂剂掺入环氧基中，合成了环氧/CeO2纳米复合材料。采用Tafel极化技术和电化学阻抗谱（EIS）研究了EP/CeO2纳米复合材料在1 M CH3COOH和0.5 M H2SO4中对不锈钢棒的缓蚀作用。该研究在298 K下进行，纳米ceo2作为一种优异的缓蚀剂。对得到的数据进行了分析，并建立了相应的兰德尔斯电路模型。利用紫外可见光谱研究了EP/CeO2纳米复合材料的紫外可见辐射效应。纳米铈包合量较大的样品在402 nm左右出现最高吸收峰。研究了EP/CeO2纳米复合材料在不同频率下的介电性能，其介电常数和介电常数随频率的增加而减小。FESEM图详细描述了纳米微球在基体中的均匀分散、粒径分布以及在某些浓度下团聚的可能性。

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来源期刊

Applied Nanoscience Materials Science-Materials Science (miscellaneous)

CiteScore

7.10

自引率

0.00%

发文量

430

期刊介绍： Applied Nanoscience is a hybrid journal that publishes original articles about state of the art nanoscience and the application of emerging nanotechnologies to areas fundamental to building technologically advanced and sustainable civilization, including areas as diverse as water science, advanced materials, energy, electronics, environmental science and medicine. The journal accepts original and review articles as well as book reviews for publication. All the manuscripts are single-blind peer-reviewed for scientific quality and acceptance.